diff --git a/codeflash/discovery/discover_unit_tests.py b/codeflash/discovery/discover_unit_tests.py
index 273455d0b..bf0668b83 100644
--- a/codeflash/discovery/discover_unit_tests.py
+++ b/codeflash/discovery/discover_unit_tests.py
@@ -219,10 +219,18 @@ def __init__(self, function_names_to_find: set[str]) -> None:
         # For prefix match, store mapping from prefix-root to candidates for O(1) matching
         self._exact_names = function_names_to_find
         self._prefix_roots: dict[str, list[str]] = {}
+        # Precompute sets for faster lookup during visit_Attribute()
+        self._dot_names: set[str] = set()
+        self._dot_methods: dict[str, set[str]] = {}
+        self._class_method_to_target: dict[tuple[str, str], str] = {}
         for name in function_names_to_find:
             if "." in name:
-                root = name.split(".", 1)[0]
-                self._prefix_roots.setdefault(root, []).append(name)
+                root, method = name.rsplit(".", 1)
+                self._dot_names.add(name)
+                self._dot_methods.setdefault(method, set()).add(root)
+                self._class_method_to_target[(root, method)] = name
+                root_prefix = name.split(".", 1)[0]
+                self._prefix_roots.setdefault(root_prefix, []).append(name)
 
     def visit_Import(self, node: ast.Import) -> None:
         """Handle 'import module' statements."""
@@ -321,44 +329,45 @@ def visit_Attribute(self, node: ast.Attribute) -> None:
         if self.found_any_target_function:
             return
 
+        # Check if this is accessing a target function through an imported module
+
+        node_value = node.value
+        node_attr = node.attr
+
         # Check if this is accessing a target function through an imported module
         if (
-            isinstance(node.value, ast.Name)
-            and node.value.id in self.imported_modules
-            and node.attr in self.function_names_to_find
+            isinstance(node_value, ast.Name)
+            and node_value.id in self.imported_modules
+            and node_attr in self.function_names_to_find
         ):
             self.found_any_target_function = True
-            self.found_qualified_name = node.attr
+            self.found_qualified_name = node_attr
             return
 
-        if isinstance(node.value, ast.Name) and node.value.id in self.imported_modules:
-            for target_func in self.function_names_to_find:
-                if "." in target_func:
-                    class_name, method_name = target_func.rsplit(".", 1)
-                    if node.attr == method_name:
-                        imported_name = node.value.id
-                        original_name = self.alias_mapping.get(imported_name, imported_name)
-                        if original_name == class_name:
-                            self.found_any_target_function = True
-                            self.found_qualified_name = target_func
-                            return
+        # Check for methods via imported modules using precomputed _dot_methods and _class_method_to_target
+        if isinstance(node_value, ast.Name) and node_value.id in self.imported_modules:
+            roots_possible = self._dot_methods.get(node_attr)
+            if roots_possible:
+                imported_name = node_value.id
+                original_name = self.alias_mapping.get(imported_name, imported_name)
+                if original_name in roots_possible:
+                    self.found_any_target_function = True
+                    self.found_qualified_name = self._class_method_to_target[(original_name, node_attr)]
+                    return
 
         # Check if this is accessing a method on an instance variable
-        if isinstance(node.value, ast.Name) and node.value.id in self.instance_mapping:
-            class_name = self.instance_mapping[node.value.id]
-            for target_func in self.function_names_to_find:
-                if "." in target_func:
-                    target_class, method_name = target_func.rsplit(".", 1)
-                    if node.attr == method_name and class_name == target_class:
-                        self.found_any_target_function = True
-                        self.found_qualified_name = target_func
-                        return
-
-        # Check if this is accessing a target function through a dynamically imported module
-        # Only if we've detected dynamic imports are being used
-        if self.has_dynamic_imports and node.attr in self.function_names_to_find:
+        if isinstance(node_value, ast.Name) and node_value.id in self.instance_mapping:
+            class_name = self.instance_mapping[node_value.id]
+            roots_possible = self._dot_methods.get(node_attr)
+            if roots_possible and class_name in roots_possible:
+                self.found_any_target_function = True
+                self.found_qualified_name = self._class_method_to_target[(class_name, node_attr)]
+                return
+
+        # Check for dynamic import match
+        if self.has_dynamic_imports and node_attr in self.function_names_to_find:
             self.found_any_target_function = True
-            self.found_qualified_name = node.attr
+            self.found_qualified_name = node_attr
             return
 
         self.generic_visit(node)